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Securedly erase memory cards?
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Ant
Nov 26, 2012, 5:40:32 AM11/26/12
to
Hello.
Will DBan work on these (e.g., very old SD mini and micro types from 16
MB to 2 GB sizes), or do I need to use a special memory card software
for them?
Thank you in advance. :)
--
"Since the world began, we have never exterminated. We probably shall
never exterminate as much as one single insect species. If there was
ever an example of an insect we cannot destroy, the fire ant is it."
--an entomologist quote mentioned by Leonard Nimoy on In The Search Of:
Deadly Ants (1978)
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Will DBan work on these (e.g., very old SD mini and micro types from 16
MB to 2 GB sizes), or do I need to use a special memory card software
for them?
Thank you in advance. :)
--
"Since the world began, we have never exterminated. We probably shall
never exterminate as much as one single insect species. If there was
ever an example of an insect we cannot destroy, the fire ant is it."
--an entomologist quote mentioned by Leonard Nimoy on In The Search Of:
Deadly Ants (1978)
/\___/\ Ant(Dude) @ http://antfarm.ma.cx (Personal Web Site)
/ /\ /\ \ Ant's Quality Foraged Links: http://aqfl.net
| |o o| |
\ _ / If crediting, then use Ant nickname and AQFL URL/link.
( ) If e-mailing, then axe ANT from its address if needed.
Ant is currently not listening to any songs on this computer.
Arno
Nov 26, 2012, 8:45:16 AM11/26/12
to
In comp.sys.ibm.pc.hardware.storage Ant <a...@zimage.comant> wrote:
> Hello.
> Will DBan work on these (e.g., very old SD mini and micro types from 16
> MB to 2 GB sizes), or do I need to use a special memory card software
> for them?
Nothing will work reliably on any type of flash disk storage
> Hello.
> Will DBan work on these (e.g., very old SD mini and micro types from 16
> MB to 2 GB sizes), or do I need to use a special memory card software
> for them?
device due to defect management and dynamic sector mapping.
My avice: Overwrite a few times with zeros, then do physical
destruction (blowtorch, hammer).
Arno
Mark F
Nov 26, 2012, 11:59:36 AM11/26/12
to
older cards. Also note that there may be information that isn't on
the main chips or even in the arrays on the main chips, so burn
everything.
>
> Arno
Rod Speed
Nov 26, 2012, 1:26:33 PM11/26/12
to
Ant <a...@zimage.comANT> wrote
> Will DBan work on these (e.g., very old SD mini
> and micro types from 16 MB to 2 GB sizes),
No, particularly if you want to wipe the blocks that
have been discarded because they have died.
> or do I need to use a special memory card software for them?
That is the best approach if you want to wipe everything
so no one can ever find anything incriminating in the
blocks that have been discarded because they have died.
> Will DBan work on these (e.g., very old SD mini
> and micro types from 16 MB to 2 GB sizes),
have been discarded because they have died.
> or do I need to use a special memory card software for them?
so no one can ever find anything incriminating in the
blocks that have been discarded because they have died.
Franc Zabkar
Nov 26, 2012, 6:17:18 PM11/26/12
to
On 26 Nov 2012 13:45:16 GMT, Arno <m...@privacy.net> put finger to
keyboard and composed:
>Nothing will work reliably on any type of flash disk storage
>device due to defect management and dynamic sector mapping.
The ATA standard provides an Enhanced Secure Erase command that also
erases remapped sectors. I don't know if this also applies to flash
media.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
keyboard and composed:
>Nothing will work reliably on any type of flash disk storage
>device due to defect management and dynamic sector mapping.
erases remapped sectors. I don't know if this also applies to flash
media.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
Franc Zabkar
Nov 26, 2012, 6:46:44 PM11/26/12
to
On Tue, 27 Nov 2012 10:17:18 +1100, Franc Zabkar
<fza...@iinternode.on.net> put finger to keyboard and composed:
>The ATA standard provides an Enhanced Secure Erase command that also
>erases remapped sectors. I don't know if this also applies to flash
>media.
Sorry, I meant to say that I don't know whether a similar command
exists for flash media. Memory cards use SCSI commands, not ATA
commands, AFAIK.
<fza...@iinternode.on.net> put finger to keyboard and composed:
>The ATA standard provides an Enhanced Secure Erase command that also
>erases remapped sectors. I don't know if this also applies to flash
>media.
exists for flash media. Memory cards use SCSI commands, not ATA
commands, AFAIK.
Arno
Nov 26, 2012, 7:23:26 PM11/26/12
to
In comp.sys.ibm.pc.hardware.storage Franc Zabkar <fza...@iinternode.on.net> wrote:
> On Tue, 27 Nov 2012 10:17:18 +1100, Franc Zabkar
> <fza...@iinternode.on.net> put finger to keyboard and composed:
>>The ATA standard provides an Enhanced Secure Erase command that also
>>erases remapped sectors. I don't know if this also applies to flash
>>media.
> Sorry, I meant to say that I don't know whether a similar command
> exists for flash media. Memory cards use SCSI commands, not ATA
> commands, AFAIK.
Even if it exists, it is not trustworthy. There are rumours
> On Tue, 27 Nov 2012 10:17:18 +1100, Franc Zabkar
> <fza...@iinternode.on.net> put finger to keyboard and composed:
>>The ATA standard provides an Enhanced Secure Erase command that also
>>erases remapped sectors. I don't know if this also applies to flash
>>media.
> Sorry, I meant to say that I don't know whether a similar command
> exists for flash media. Memory cards use SCSI commands, not ATA
> commands, AFAIK.
about some SSDs that do not implement this correctly and
directly readun the Flash chips still gives you the data.
Arno
Richard Kettlewell
Nov 27, 2012, 4:11:23 AM11/27/12
to
Arno <m...@privacy.net> writes:
> Franc Zabkar <fza...@iinternode.on.net> wrote:
For example:
https://db.usenix.org/events/fast11/tech/full_papers/Wei.pdf
Disposal at end of life is only one part of the question though.
External media and laptops can be lost or stolen (as can desktops or
servers, though I suspect the risk is lower in those cases).
I would argue that usually it’s best to achieve confidentiality by
encrypting important data before you start rather than by attempting to
erase it when you finish.
--
http://www.greenend.org.uk/rjk/
> Franc Zabkar <fza...@iinternode.on.net> wrote:
>> Franc Zabkar wrote:
>>> The ATA standard provides an Enhanced Secure Erase command that also
>>> erases remapped sectors. I don't know if this also applies to flash
>>> media.
>>
>> Sorry, I meant to say that I don't know whether a similar command
>> exists for flash media. Memory cards use SCSI commands, not ATA
>> commands, AFAIK.
>
> Even if it exists, it is not trustworthy. There are rumours
> about some SSDs that do not implement this correctly and
> directly readun the Flash chips still gives you the data.
Never mind rumours, there are research papers on the question.
>>> The ATA standard provides an Enhanced Secure Erase command that also
>>> erases remapped sectors. I don't know if this also applies to flash
>>> media.
>>
>> Sorry, I meant to say that I don't know whether a similar command
>> exists for flash media. Memory cards use SCSI commands, not ATA
>> commands, AFAIK.
>
> Even if it exists, it is not trustworthy. There are rumours
> about some SSDs that do not implement this correctly and
> directly readun the Flash chips still gives you the data.
For example:
https://db.usenix.org/events/fast11/tech/full_papers/Wei.pdf
Disposal at end of life is only one part of the question though.
External media and laptops can be lost or stolen (as can desktops or
servers, though I suspect the risk is lower in those cases).
I would argue that usually it’s best to achieve confidentiality by
encrypting important data before you start rather than by attempting to
erase it when you finish.
--
http://www.greenend.org.uk/rjk/
Ant
Nov 27, 2012, 9:42:26 AM11/27/12
to
On 11/26/2012 10:26 AM PT, Rod Speed typed:
>> or do I need to use a special memory card software for them?
>
> That is the best approach if you want to wipe everything
> so no one can ever find anything incriminating in the blocks that have
> been discarded because they have died.
Is SDFormatter v3.1, from https://www.sdcard.org/downloads/formatter_3/
, sufficient enough? It was suggested from
http://www.dslreports.com/forum/r27719820-Securedly-erase-memory-cards-
security forum thread. :)
--
"In a battle between elephants, the ants get squashed." --Thailand
>> or do I need to use a special memory card software for them?
>
> That is the best approach if you want to wipe everything
> so no one can ever find anything incriminating in the blocks that have
> been discarded because they have died.
, sufficient enough? It was suggested from
http://www.dslreports.com/forum/r27719820-Securedly-erase-memory-cards-
security forum thread. :)
--
"In a battle between elephants, the ants get squashed." --Thailand
Rod Speed
Nov 27, 2012, 12:57:17 PM11/27/12
to
"Ant" <a...@zimage.comANT> wrote in message
news:N8qdna5LKr3PTCnN...@earthlink.com...
> On 11/26/2012 10:26 AM PT, Rod Speed typed:
>
>>> or do I need to use a special memory card software for them?
>>
>> That is the best approach if you want to wipe everything
>> so no one can ever find anything incriminating in the blocks that have
>> been discarded because they have died.
> Is SDFormatter v3.1, from https://www.sdcard.org/downloads/formatter_3/ ,
> sufficient enough?
Fraid not. You can never be sure what the memory card design has
>
>>> or do I need to use a special memory card software for them?
>>
>> That is the best approach if you want to wipe everything
>> so no one can ever find anything incriminating in the blocks that have
>> been discarded because they have died.
> Is SDFormatter v3.1, from https://www.sdcard.org/downloads/formatter_3/ ,
> sufficient enough?
done implementation wise with what its decided are bad blocks.
If the data matters, only physical destruction is safe.
Ant
Nov 27, 2012, 4:38:41 PM11/27/12
to
> >>> or do I need to use a special memory card software for them?
> >>
> >> That is the best approach if you want to wipe everything
> >> so no one can ever find anything incriminating in the blocks that have
> >> been discarded because they have died.
> > Is SDFormatter v3.1, from https://www.sdcard.org/downloads/formatter_3/ ,
> > sufficient enough?
> Fraid not. You can never be sure what the memory card design has
> done implementation wise with what its decided are bad blocks.
> If the data matters, only physical destruction is safe.
Thanks. :(
> >>
> >> That is the best approach if you want to wipe everything
> >> so no one can ever find anything incriminating in the blocks that have
> >> been discarded because they have died.
> > Is SDFormatter v3.1, from https://www.sdcard.org/downloads/formatter_3/ ,
> > sufficient enough?
> Fraid not. You can never be sure what the memory card design has
> done implementation wise with what its decided are bad blocks.
> If the data matters, only physical destruction is safe.
--
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